<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Title</title>
</head>
<body>
    <div id="app">
        <div v-pre>
            <h2>{{message}}</h2>
            <p>当前计数：{{counter}}</p>
            <p>{{}}</p>
        </div>
    </div>
    <script src="https://unpkg.com/vue@3"></script>
    <script>
        const app=Vue.createApp({
            data(){
                return{
                    message:'hello vue',
                    counter:0
                }
            }
        })
        app.mount("#app")
    </script>
</body>
</html>